#include <REGX52.H>
#include "DS1302.h"
#include "LCD1602.h"
#include "Key.h"
#include "Timer0.h"

unsigned char KeyNum,MODE,TimeSelect,TimeFlag;

void TimeSet()
{
	if(KeyNum==2)
	{
		TimeSelect++;
		TimeSelect%=6;
	}
	if(KeyNum==3)
	{
		DS1302_Time[TimeSelect]++;
		if(DS1302_Time[0]>99){DS1302_Time[0]=0;}
		if(DS1302_Time[1]>12){DS1302_Time[1]=1;}
		if(DS1302_Time[1]==1 || DS1302_Time[1]==3 || DS1302_Time[1]==5 || DS1302_Time[1]==7 ||
		   DS1302_Time[1]==8 || DS1302_Time[1]==10 || DS1302_Time[1]==12)
		{
			if(DS1302_Time[2]>31){DS1302_Time[2]=1;}
		}else if(DS1302_Time[1]==4 || DS1302_Time[1]==6 || DS1302_Time[1]==9 || DS1302_Time[1]==11)
		{
			if(DS1302_Time[2]>30){DS1302_Time[2]=1;}
		}
		else if(DS1302_Time[0]%4==0)
		{
			if(DS1302_Time[2]>29){DS1302_Time[2]=1;}
		}
		else
		{
			if(DS1302_Time[2]>28){DS1302_Time[2]=1;}
		}
		if(DS1302_Time[3]>23){DS1302_Time[3]=0;}
		if(DS1302_Time[4]>59){DS1302_Time[4]=0;}
		if(DS1302_Time[5]>59){DS1302_Time[5]=0;}
	}
	if(KeyNum==4)
	{
		DS1302_Time[TimeSelect]--;
		if(DS1302_Time[0]<0){DS1302_Time[0]=99;}
		if(DS1302_Time[1]<1){DS1302_Time[1]=12;}
		if(DS1302_Time[1]==1 || DS1302_Time[1]==3 || DS1302_Time[1]==5 || DS1302_Time[1]==7 ||
		   DS1302_Time[1]==8 || DS1302_Time[1]==10 || DS1302_Time[1]==12)
		{
			if(DS1302_Time[2]<1){DS1302_Time[2]=31;}
			if(DS1302_Time[2]>31){DS1302_Time[2]=1;}
		}else if(DS1302_Time[1]==4 || DS1302_Time[1]==6 || DS1302_Time[1]==9 || DS1302_Time[1]==11)
		{
			if(DS1302_Time[2]<1){DS1302_Time[2]=30;}
			if(DS1302_Time[2]>30){DS1302_Time[2]=1;}
		}
		else if(DS1302_Time[0]%4==0)
		{
			if(DS1302_Time[2]<1){DS1302_Time[2]=29;}
			if(DS1302_Time[2]>29){DS1302_Time[2]=1;}
		}
		else
		{
			if(DS1302_Time[2]<1){DS1302_Time[2]=28;}
			if(DS1302_Time[2]>28){DS1302_Time[2]=1;}
		}
		if(DS1302_Time[3]<0){DS1302_Time[3]=23;}
		if(DS1302_Time[4]<0){DS1302_Time[4]=59;}
		if(DS1302_Time[5]<0){DS1302_Time[5]=59;}
	}
	if(TimeFlag==1&&TimeSelect==0){LCD_ShowString(1,1,"  ");}
	else{LCD_ShowNum(1,1,DS1302_Time[0],2);}
	if(TimeFlag==1&&TimeSelect==1){LCD_ShowString(1,4,"  ");}
	else{LCD_ShowNum(1,4,DS1302_Time[1],2);}
	if(TimeFlag==1&&TimeSelect==2){LCD_ShowString(1,7,"  ");}
	else{LCD_ShowNum(1,7,DS1302_Time[2],2);}
	if(TimeFlag==1&&TimeSelect==3){LCD_ShowString(2,1,"  ");}
	else{LCD_ShowNum(2,1,DS1302_Time[3],2);}
	if(TimeFlag==1&&TimeSelect==4){LCD_ShowString(2,4,"  ");}
	else{LCD_ShowNum(2,4,DS1302_Time[4],2);}
	if(TimeFlag==1&&TimeSelect==5){LCD_ShowString(2,7,"  ");}
	else{LCD_ShowNum(2,7,DS1302_Time[5],2);}
}

void TimeShow()	
{
	DS1302_ReadTime();
	LCD_ShowNum(1,1,DS1302_Time[0],2);
	LCD_ShowNum(1,4,DS1302_Time[1],2);
	LCD_ShowNum(1,7,DS1302_Time[2],2);
	LCD_ShowNum(2,1,DS1302_Time[3],2);
	LCD_ShowNum(2,4,DS1302_Time[4],2);
	LCD_ShowNum(2,7,DS1302_Time[5],2);
}

void main()
{
	LCD_Init();
	DS1302_Init();
	Timer0Init();
	
	LCD_ShowString(1,1,"  -  -");
	LCD_ShowString(2,1,"  :  :");
	DS1302_WriteByte(0x8E,0x00);
	
	DS1302_SetTime();
	
	while(1)
	{
		KeyNum=Key();
		if(KeyNum==1)
		{
			if(MODE==0){MODE=1;TimeSelect=0;}
			else if(MODE==1){MODE=0;DS1302_SetTime();}
		}
		switch(MODE)
		{
			case 0: TimeShow();break;
			case 1: TimeSet();break;
		}
	}
}

void Timer0_Routine() interrupt 1
{
	static unsigned int T0Count;
	TL0 = 0x66;
	TH0 = 0xFC;
	T0Count++;
	if(T0Count>=1000)
	{
		T0Count=0;
		TimeFlag=!TimeFlag;
	}
}